Plc Programming Ladder Logic
One of the best visual programming languages is a plc programming language called ladder logic or ladder diagram ld.
Plc programming ladder logic. Among several programming languages ladder logic diagram is the most basic and simplest form of programming the plc. The great thing about ladder logic is that it s much more visual than most programming languages so people often find it a lot easier to learn. In this case the plc programming language ladder logic. If you learn ladder logic programming using allen bradley software and suddenly find the need to program a siemens plc you already know the most important part how to program.
When the plc was invented designers found a way to use the existing knowledge of the relay control system designers for programming the plc. The reason for its popularity is that relay logic diagrams were closely resembled by the ladder logic diagrams. You can reuse chunks of a plc program in your own plc program. As programmable logic controllers became more sophisticated it has also been used in very complex automation systems.
Part 1 of 2 more videos are available. Before going to program the plc with this language one should know some basic information about it. In fact reusable code is widely used and many automation projects are build on the isa 88 or s88 batch control standard which encourages reusable function blocks. Ladder logic is a visual programming language used to program plc s programmable logic controllers.
Introduction to plc ladder logic programming. The below figure shows the hardwired ladder diagram wherein the same. Ladder logic is widely used to program plcs where sequential control of a process or manufacturing operation is required ladder logic is useful for simple but critical control systems or for reworking old hardwired relay circuits. This video is an introduction to what ladder logic is and how it works.